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is a trigonometric rule used to calculate the length of a side or the size of an angle in a non right-angled triangle. The rule states that the square of any side equals the sum of the squares of the other two sides less twice the product of the other two sides and the cosine ratio of the angle between those two sides.
(N) all the counting numbers, starting at 1: N = {1, 2, 3, 4, 5, ...}
a term used to describe the three ways of finding a statistical average value in a data set,...
all the natural positive numbers, together with zero. N0 = {0; 1; 2; 3; 4; 5; ...}...
the maximum point on a curved graph is the point at which a graph changes from an increasing...